Frederic Brünner

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60 Answers

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1
North and south of magnetic field
4
Irreducible Representations Of Lorentz Group
2
What is tricritical point？
1
What is the exact relationship between on-shell amplitudes and off-shell correlators in AdS/CFT?
2
Is time going backwards beyond the event horizon of a black hole?
2
Why is $R^2$ gravity not unitary?
1
Dimensional analysis - the argument of functions
1
Is it possible to “add cold” or to “add heat” to systems?
1
Calculate the center of mass of a semicircle
0
Contracting the Riemann tensor issues, p540 hobson
0
Violation of Lorentz invariance (Lagrangian for particle)
1
Acoustic wave equation for a closed sphere
0
How would Lagrangian be used tor recover Schrodinger equation?
1
Do electrons have definite and single value of momentum and position?
2
Does a photon have a north and south pole?
1
Maxwell Stress Tensor in the absence of a magnetic field
0
if i want action to be positive number then it require that $\tau_i$ be bigger than $\tau_f$, isn't it true?
1
Two General Relativity questions
3
Reason for considering the positive root
3
Electric force on spherical surface
3
Boundary conditions of relativistic wave solutions?
0
Electric Field inside a hollow ball, excentred of a homogeneous charged ball
2
Higgs-Boson/Graviton
1
Collision of two photons
1
How to calculate pressure field in potential flow
0
Effective operator in four-fermion interaction
1
What is the momentum of these emitted photons?
2
Ashcroft Mermin Eq. 17.47ff
0
Superconducting gap, temperature dependence: how to calculate this integral?
1
Relationship between mass, energy, and a force?
1 2